/**
 * Copyright 2013-2014 Guoqiang Chen, Shanghai, China. All rights reserved.
 *
 *   Author: Guoqiang Chen
 *    Email: subchen@gmail.com
 *   WebURL: https://github.com/subchen
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package jetbrick.web.mvc.action.annotation;

import jetbrick.bean.ParameterInfo;
import jetbrick.web.mvc.RequestContext;
import jetbrick.web.mvc.WebConfig;

public final class RequestBodyArgumentGetter implements AnnotatedArgumentGetter<RequestBody, Object> {
    private ParameterInfo parameter;
    private RequestBodyGetter<?> requestBodyGetter;

    @Override
    public void initialize(ArgumentContext<RequestBody> ctx) {
        parameter = ctx.getParameter();
        requestBodyGetter = WebConfig.getRequestBodyGetterResolver().resolve(ctx.getRawParameterType());
        if (requestBodyGetter == null) {
            throw new IllegalStateException("Unable to resolve RequestBodyGetter for " + ctx.getRawParameterType());
        }
    }

    @Override
    public Object get(RequestContext ctx) throws Exception {
        return requestBodyGetter.get(ctx, parameter);
    }

}
